...of winter, meaning late December through January. In 1997, Testov's attempt to climb McKinley in January with Andrey Isupov ended at about 12,000 feet when Testov fell into a crevasse and had to cut loose a sled loaded with food and fuel...

...winter, but waited until closer to the start of spring, when the light returns and the winds moderate. Testov and Andrey Isupov, 32, made an earlier attempt at a winter ascent in December 1996. But they had to turn back after Testov fell into...